release/src/router/nettle/camellia.h

   1 /* camellia.h
   2  *
   3  * Copyright (C) 2006,2007
   4  * NTT (Nippon Telegraph and Telephone Corporation).
   5  *
   6  * Copyright (C) 2010 Niels Möller
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22
  23 #ifndef NETTLE_CAMELLIA_H_INCLUDED
  24 #define NETTLE_CAMELLIA_H_INCLUDED
  25
  26 #include "nettle-types.h"
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /* Name mangling */
  33 #define camellia_set_encrypt_key nettle_camellia_set_encrypt_key
  34 #define camellia_set_decrypt_key nettle_camellia_set_decrypt_key
  35 #define camellia_invert_key nettle_camellia_invert_key
  36 #define camellia_crypt nettle_camellia_crypt
  37 #define camellia_crypt nettle_camellia_crypt
  38
  39 #define CAMELLIA_BLOCK_SIZE 16
  40 /* Valid key sizes are 128, 192 or 256 bits (16, 24 or 32 bytes) */
  41 #define CAMELLIA_MIN_KEY_SIZE 16
  42 #define CAMELLIA_MAX_KEY_SIZE 32
  43 #define CAMELLIA_KEY_SIZE 32
  44
  45 struct camellia_ctx
  46 {
  47   /* Number of subkeys. */
  48   unsigned nkeys;
  49
  50   /* For 128-bit keys, there are 18 regular rounds, pre- and
  51      post-whitening, and two FL and FLINV rounds, using a total of 26
  52      subkeys, each of 64 bit. For 192- and 256-bit keys, there are 6
  53      additional regular rounds and one additional FL and FLINV, using
  54      a total of 34 subkeys. */
  55   /* The clever combination of subkeys imply one of the pre- and
  56      post-whitening keys is folded with the round keys, so that subkey
  57      #1 and the last one (#25 or #33) is not used. The result is that
  58      we have only 24 or 32 subkeys at the end of key setup. */
  59   uint64_t keys[32];
  60 };
  61
  62 void
  63 camellia_set_encrypt_key(struct camellia_ctx *ctx,
  64                          unsigned length, const uint8_t *key);
  65
  66 void
  67 camellia_set_decrypt_key(struct camellia_ctx *ctx,
  68                          unsigned length, const uint8_t *key);
  69
  70 void
  71 camellia_invert_key(struct camellia_ctx *dst,
  72                     const struct camellia_ctx *src);
  73
  74 void
  75 camellia_crypt(const struct camellia_ctx *ctx,
  76                unsigned length, uint8_t *dst,
  77                const uint8_t *src);
  78 #ifdef  __cplusplus
  79 }
  80 #endif
  81
  82 #endif /* NETTLE_CAMELLIA_H_INCLUDED */